Improvement in locks for doors



T. HENDRICKS.

LOCKS Pontoons, m. No.179,-919'. j Patented {1115118, 1875.

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ATTORNEYS.

N-PEIERS. PHOTOQLTI'HOGRAFHER. IWISHINGTON. D a

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UNITED STATES PATENT OFFIoE.

THEODORE HENDRICKS, 'OF NEW YORK, ASSIGNOR TO HIMSELF AND WILLIAM E.PRICE, OF BROOKLYN, N. Y.

IMPROVEMENT IN LOCKS FOR DOORS &c.

Specification forming part of Letters Patent No. 179,919, dated July 18,1876; application filed May 16, 1876.

To all whom it may concern:

Be it known that 1, THEODORE HENDRICKS, of the city, county, and Stateof New York,

have invented a new and Improved Tubular fully described.

In the accompanying drawing, Figure 1 is a perspective view of myimproved lock with part of the case removed. Fig. 2 is a perspectiveview of the part of the case removed Fig 3 is a perspective view of thekey. Fig. 4 is a top view of the lock,as represented in-Fig. 1. Fig. 5is a longitudinal section on line X X, Fig. 4c. Fig. 6 is a plan of thepart of the case represented in Fig. 2. Fig. 7 is a sectionon line Y Y,Fig. 4; and Fig. 8 is a section on line Z Z, Fig. 4.

Similar letters of reference indicate correspondiu g parts.

The case is made of two half-circular tubes, A B, and a faceplate, O,the latter being attached to the end of the part A of the case, andhaving a screw-thread, c, for screwing into the wood to secure the look;also a bevel shoulder, D, for making a neat finish, flush with thesurface. The part B of the case fits on the edges of the part A, and isfastened by the lug l) on the inside of the face-plate entering the slotE in the end plate F, and by -\vard.

constitute the forward and backward stops,

the stud Gin the catch-plate H entering the slot I. J is the bolt,which, at the head, is as wide as the interior of the tube, but isnarrowed to halt the breadth, or thcreabout, to make room for the keywayT, with one edge fitting against the wall of the tube, and the otherresting on the plate H. The spring K is attached to the-side of the boltby the stud L, and is raised by the key Without raising the bolt toengage and disengage the hooks N with the catch-slots O P, for fasteningthe bolt. This spring is split, or made in two parts, one of which has alonger hook or catch, N, than the other, to be raised by the bit-Q,while the other is raised by the ward R, and there is a stud, S, on thebolt to prevent it from being raised bya key not having the Theshoulders to in the side of the bolt and act against the stud b of plateH, which bears against the side of the bolt to keep it in its place.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

A tubular lock provided with a split or.

double spring, K, having book ends of diii'erent length *to engage witha catch-plate, as shown and described.

THEODORE HENDRICKS.

Witnesses:

' T. B. MOSHER,

ALEX. F. ROBERTS.

